Huffington Post: Climate change is such an expansive problem that it is often difficult to know where to begin to address it. It is a technological challenge: How do we develop and exploit the technology of the day to usher in a sustainable future? It is an economic challenge: How do investors remove the inherent risk of climate change from their portfolios and shift the world toward a green economy? It is, of course, a political challenge: How do we find consensus on a way forward for 193 nations at different stages...